Kennedy Half dollar rim issue
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that is what i usually attribute that gully around the rim and other devices to, die fatigue. there are some morgans with this effect, especially on the rev that are VERY neat imo.
iirc, these effects usually spawn from improper tempering, basining etc. there is some good material out on the subject, spread across a few sites/forums.coinfacts.com - conecaonline.info - board.conecaonline.org/forum/numismatic-site-links - briansvarietycoins.com - coppercoins.com - cuds-on-coins.com - doubleddie.com - error-ref.com - franklinlover.yolasite.com - ikegroup.info -lincolncentresource.com - maddieclashes.com - money.org - ngccoin.com/price-guide/world - ngccoin.com/census - ngccoin.com/resources/counterfeit-detection - nnp.wustl.edu - pcgs.com/pop - pcgs.com/coinfacts - pcgs.com/photograde - varietyvista.com - vamworld.com
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